Imperial College London
Alternate

DrNicolasNiasse

Faculty of Natural Sciences, Department of Physics

Academic Visitor
 
 
 
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Contact

 

+44 (0)20 7594 5659n.niasse

 
 
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Location

 

739BBlackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Chittenden:2016:10.1063/1.4949523,
author = {Chittenden, JP and Appelbe, BD and Manke, F and McGlinchey, K and Niasse, NPL},
doi = {10.1063/1.4949523},
journal = {Physics of Plasmas},
title = {Signatures of asymmetry in neutron spectra and images predicted by three-dimensional radiation hydrodynamics simulations of indirect drive implosions},
url = {http://dx.doi.org/10.1063/1.4949523},
volume = {23},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We present the results of 3D simulations of indirect drive inertial confinement fusion capsules driven by the “high-foot” radiation pulse on the National Ignition Facility. The results are post-processed using a semi-deterministic ray tracing model to generate synthetic deuterium-tritium (DT) and deuterium-deuterium (DD) neutronspectra as well as primary and down scatteredneutronimages. Results with low-mode asymmetries are used to estimate the magnitude of anisotropy in the neutronspectra shift, width, and shape. Comparisons of primary and down scatteredimages highlight the lack of alignment between the neutron sources,scatter sites, and detector plane, which limits the ability to infer the ρr of the fuel from a down scattered ratio. Further calculations use high bandwidth multi-mode perturbations to induce multiple short scale length flows in the hotspot. The results indicate that the effect of fluid velocity is to produce a DT neutronspectrum with an apparently higher temperature than that inferred from the DD spectrum and which is also higher than the temperature implied by the DT to DD yield ratio.
AU  - Chittenden,JP
AU  - Appelbe,BD
AU  - Manke,F
AU  - McGlinchey,K
AU  - Niasse,NPL
DO  - 10.1063/1.4949523
PY  - 2016///
SN  - 1089-7674
TI  - Signatures of asymmetry in neutron spectra and images predicted by three-dimensional radiation hydrodynamics simulations of indirect drive implosions
T2  - Physics of Plasmas
UR  - http://dx.doi.org/10.1063/1.4949523
UR  - http://hdl.handle.net/10044/1/33087
VL  - 23
ER  -
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